To deflate your device, perform the following steps:

1. Make sure to place the inner part of your device out of its textile cover.
2. Put the lower part towards you.
   A notch with the word Reset below indicates the location of the reset button.
3. Unplug, then plug Sleep using the provided adapter.
4. Press the reset button successively three times.
   A slight click indicates that the device valve is open. The solid white LED lights up, the sensor should slightly deflate.
   Important: Keep the sensor plugged during the whole process. When the sensor is unplugged, the valve closes and prevents any air input/output of your device. Note that the valve closes after 3 minutes.
5. Remove the air from the sensor. Please refer to the picture below.
   
6. Unplug your device.
7. Put the inner part of the device back into the textile cover.
   Make sure to flatten the sensor all over its surface in the textile cover.